RGB denoising

[nihm]

I have an RGB image with some noise I want to filter.

I want to do that by using Daubechie's wavelet.

the idea is to decompose the image to the R,G,B fields, wavelet transform for each, pass through a threshold and then recompose.

my problem at the moment is that when I try to perform the built-in Daubechie wavelet transform to any of the field array ( R,G,or B) I get zeros as result (the array is not empty).

any insights on how it should be done?

[tinnitus]

Hello, nihm,

could you send your vi?

@+

Tinnitus

[nihm]

nothing really compilcated

first image I decompose the image (checked it, it's ok)

second - trying the wavelet transform

[nihm]

I forgot to add, that as far as I can see the error is just after the wavelet transform. nothing comes out, therefor what follws doesn't work (is there an edit option to messages?? couldn't find it)

[tinnitus]

Hello,

did you try to connect error terminal? to see if there is one

is your X entry a 2 power lenght ?

 ps : you can edityour message few minutes ( i don't know how 2-3) after posted : option-edit...

@+

Tinnitus

Message Edité par tinnitus le 01-28-2009 10:33 AM

[nihm]

how do I check if it's a power of 2 length??

I didn't change anything in the image (except decomposing)

[tinnitus]

by definition wavelet decomposes signal by 2 by 2by 2....

length tools could be find in array palette then enlarge indicator to see both dimension

@+

Tinnitus

[nihm]

so, do I need the size of the 1-D array to be a power of 2, or just even??

[tinnitus]

power of 2...

did you connect erreur terminal ?

[nihm]

The error I'm getting is -23053, and the size of the array is not a power of 2.

I'm guessing I should create a ROI which is a power of 2 and then do the filtering, or something like that??

(and thank you for taking the time to help me)